Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Materials
Paper & Plastic Packaging Products & Materials0.25%-0.02 ppConstruction Materials0.17%-0.01 ppMetal, Glass & Plastic Containers0.09%+0.01 ppSpecialty Chemicals0.87%-0.01 ppCopper0.16%-0.00 ppGold0.13%+0.00 ppIndustrial Gases0.21%+0.00 ppSteel0.12%-0.00 ppFertilizers & Agricultural Chemicals0.11%+0.00 ppCommodity Chemicals0.00%+0.00 pp
3 · Sub-industry
Inside Specialty Chemicals
Specialty Chemicals · weight
0.87%
Industry change · 12M
-0.01 pp
Specialty Chemicals · contribution
-0.007 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2018 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Ecolab → ECL | United States | $39.6bn | 0.243% | +0.016 pp | +0.016 pp | -0.1% | Yes |
| LyondellBasell → LYB | United States | $41.7bn | 0.256% | -0.014 pp | -0.014 pp | -11.0% | No |
| Albemarle Corporation → ALB | United States | $10.3bn | 0.063% | -0.007 pp | -0.007 pp | -16.6% | No |
| International Flavors & Fragrances → IFF | United States | $10.8bn | 0.066% | -0.001 pp | -0.001 pp | -8.4% | No |
| PPG Industries → PPG | United States | $27.9bn | 0.171% | -0.001 pp | -0.001 pp | -5.6% | Yes |
| Sherwin-Williams → SHW | United States | $12.3bn | 0.075% | +0.001 pp | +0.001 pp | -5.8% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.